Can You See Orion?
The interactive animation below shows you what the constellation Orion might look like.
You can adjust the darkness of the sky by moving the top slider back and forth. Move it to the right (towards the tent) to see Orion in a dark sky, the way it might look if you were out camping far away from any lights. Move the slider to the left (towards the streetlight) to see how Orion might look from a city where there are many lights around. "Magnitude" is a term astronomers use to describe how bright stars are. Stars with a magnitude that is low, like 1 or 2, are quite bright. Stars with higher number magnitudes, like 4 or 5, are dimmer. The dimmest stars that most people can see with their naked eye are around magnitude 6. The slider shows the "magnitude limit" of the dimmest stars you could see with different amounts ambient light.
The bottom slider, on top of the spinning globe, lets you change where you are on Earth. Move it up and down to see how Orion might look from different latitudes.
If you can't see the animation below, or it doesn't seem to be working right, you may need to get the latest Flash player plugin for your computer.
Shop Windows to the Universe Science Store!
The Fall 2009 issue of The Earth Scientist
, which includes articles on student research into building design for earthquakes and a classroom lab on the composition of the Earth’s ancient atmosphere, is available in our online store
You might also be interested in:
Astronomers use the term "magnitude" to describe the brightness of an object. The magnitude scale for stars was invented by the ancient Greeks, possibly by Hipparchus around 150 B.C. The Greeks grouped...more
What is light pollution? Simply put, light pollution is the unwanted illumination of the night sky created by human activity. Light pollution is sometimes said to be an undesirable byproduct of our industrialized...more
Light pollution is the unwanted illumination of the night sky created by human activity. Light pollution is a broad term that refers to multiple problems, all of which are caused by inefficient, annoying,...more
Citizen science projects involve the public in scientific research and data collection. Typically, people around the world observe phenomena from their own locale, send in data via the Internet, and then...more
In recent years astronomers have become able to detect "starspots" on distant stars! Like the sunspots that frequently dot the "surface" of the nearest star, our Sun, starspots are relatively cool, dark...more
Because of the rotation of the Earth and its orbit around the Sun, we divide the stars and constellations into two groups. Some stars and constellations never rise nor set, and they are called circumpolar....more
In the 1960's, the United States launched a series of satellites to look for very high energy photons, called Gamma Rays, that are produced whenever a nuclear bomb explodes. These satellites soon detected...more